Novel measures based on Jensen-schur for medical image registration
Jinbao Yang · Journal of Optoelectronics·laser · 2008
In order to reduce the registration time,improve the convergence ability and perform better in the presence of noise,a novel medical image registration measure is proposed,which is called Jensen-Schur measure.According to the Jensen-Schur measure,three kinds of measures are constructed: Jensen-Schur-alpha、Jensen-Renyi-alpha、Jensen-Schur-w.The characters of three measures,mutual information and normalized mutual information are analyzed and compared by applying them to rigid registration of magnetic resonance(MR)/computed tomography(CT) and MR / positron emission tomography(PET) images.The results show that Jensen-Schur-alpha(alpha=2 or 3) and Jensen-Schur-w measures outperform other measures in the computational speed,convergence performance and noise immunity.A multi-modality medical image registration test is conducted and the good result is obtained.